<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8" />
    <title>爬虫web版测试环境</title>
</head>
<body>
    <style type="text/css">
        textarea {
            width: 100%;
            height: 400px;
        }
    </style>
    <div>
        <textarea>code</textarea>
    </div>
</body>
</html>